JP5129516B2 - Apparatus and method for producing surface layer modified wood material - Google Patents

Description

  The present invention relates to a manufacturing apparatus and a manufacturing method for manufacturing a wood material having a modified surface layer portion.

  DESCRIPTION OF RELATED ART Conventionally, the manufacturing apparatus of the surface layer compression wood for manufacturing the wooden material which selectively compressed the surface layer part as described in patent document 1 is known. The surface layer compressed wood manufacturing apparatus includes a compression device that selectively compresses a surface layer portion of a wood material in water using a roll body, and a flat plate while heating the surface layer portion that has been given a history of compression deformation by the compression device. And a heating device for pressing in the above.

  According to the manufacturing apparatus having such a configuration, the surface layer portion of the wood material compressed and deformed in the compression process tries to recover to the original size and shape at least at the exit of the roll body. At this time, the wood material is immersed in water. Therefore, water is intensively absorbed only in the surface layer portion during expansion due to release from compression.

And the wood that has been subjected to water absorption treatment only on the surface layer is stored in, for example, a container and sealed, and is compressed in the heating step by the dimension given this history, that is, the surface layer that has been subjected to water absorption. When the portion is compressed and the portion is impregnated with moisture, the surface portion is made very compact by being selectively heated at a temperature sufficient to be permanently fixed, for example, 180 ° C. or higher. There is an excellent effect that the hardened surface compressed wood can be easily obtained.
JP 2004-98619 A

  However, in the manufacturing apparatus described in Patent Document 1, the surface layer portion of the wood material is solidified by a chemical action caused by heating water selectively absorbed into the surface layer portion of the wood material under a high pressure environment. However, in order to create a high-pressure environment, there is a problem that the equipment cost increases.

  In addition, in order to modify and solidify the wood structure, the wood material must be exposed to a high temperature environment of 180 ° or more, which causes the surface of the wood material to turn dark and impair the texture of the wood. There are also problems.

  SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional situation, and is an apparatus and method for producing a surface-modified woody material capable of simplifying production facilities, improving productivity, and maintaining the texture of wood. The purpose is to provide.

  The invention according to claim 1 (apparatus for producing a surface-modified wood material) is an apparatus for producing a wood material with a surface layer modified, and using the roll body in the adhesive component-containing liquid, the surface layer of the wood material An injection device that injects the adhesive component-containing liquid into the surface layer portion while selectively compressing the portion, and a heating device that heats the surface layer portion into which the adhesive component-containing liquid has been injected by the injection device The injection apparatus includes a bottom plate that is rectangular in plan view, a front inclined plate that is inclined from a front edge portion of the bottom plate and is inclined downward toward the rear, and a rear end of the bottom plate At least within the adhesive component-containing liquid provided along the front inclined plate and stored in the resin liquid tank. A roll press in which some of the roll bodies are disposed An apparatus, a dehydrator provided along the rear plate and having at least a part of a dewatering roll disposed on the liquid surface of the adhesive component-containing liquid stored in the resin liquid tank, and the resin liquid tank A transfer device having a posture changing container provided near the bottom and changing the posture between an inclined posture for receiving the wooden material discharged from the roll press device and a vertical posture for discharging the received wooden material to the dewatering device. It is characterized by including these.

A seventh aspect of the present invention (a method for producing a surface-modified wood material) is a method for producing a surface-modified wood material using the production apparatus according to any one of claims 1 to 6 , wherein the injection After the completion of the injection step of injecting the adhesive component-containing liquid into the surface layer portion while selectively compressing the surface layer portion of the wood material using the apparatus, and the temporary compression treatment in the injection step A dehydration step of performing a dehydration process on the woody material, and a heating step of performing a heat treatment on the surface layer portion into which the adhesive component-containing liquid has been injected in the dehydration step using the heating device. To do.

According to the first and seventh aspects of the present invention, in the injection device (process), the surface layer portion is once selectively compressed and deformed by the peripheral surface of the roll body in the synthetic resin-containing liquid or the natural adhesive-containing liquid. When the material passes through the roll body and the compressed state is released, the material is restored (ie, temporarily compressed), and at that time, the synthetic resin-containing liquid or the natural adhesive-containing liquid is once shrunk. The material is absorbed into the tissue by restoring the original volume of space within the tissue.

  The heated synthetic resin injected into the wood structure serves as an adhesive or a solidifying agent by the heat treatment in the heating device (process) that is performed while continuing to heat, whereby a permanent solid in the surface layer portion. Is realized.

  When the liquid is a synthetic resin-containing liquid or a natural adhesive-containing liquid, and the active ingredient therein is thermosetting, the active ingredient is cured during the heat treatment in the heating device (process). Thereby, the selective compression elastic deformation state of the surface layer portion of the wooden material, that is, the cured state is stably maintained.

  On the other hand, when the synthetic resin in the synthetic resin-containing liquid is a thermoplastic synthetic resin, the thermoplastic synthetic resin softens during heat treatment in the heating device (process) and exhibits good fluidity. It penetrates deep into the wood structure. By subjecting the woody material in this state to natural cooling or forced cooling, the surface layer portion of the woody material is stably maintained in a compression-deformed state.

  Thus, by impregnating the active material-containing liquid into the surface layer portion of the wood material in the injection device (process), the synthetic resin is inherently held by the heat treatment in the heating device (process) that is subsequently executed. Since the compressive deformation state of the surface layer portion of the wooden material is maintained based on the adhesive performance or the adhesive performance, the compression deformation state of the wooden material is simply caused by a long-time reaction between the wood structure and the heated water as in the past. Compared with the method of fixing the surface, the surface performance is improved and the productivity is also improved. Moreover, since the curing temperature or softening temperature of the synthetic resin can be set lower than the reaction temperature between the wood structure and water, it is possible to prevent discoloration of the surface of the wooden material due to the high temperature, and the wooden material The texture of is maintained.

  In addition, the wood material whose surface layer portion is impregnated with the synthetic resin-containing liquid by restoring the surface layer portion with the injection device (process) is compressed while being heated in the heating device (step). Prior to the treatment, excess water (specifically, a synthetic resin-containing liquid or a natural adhesive-containing liquid) is removed in advance by a dehydration process in the dehydrator (process). Will not leak. Moreover, since excess water is removed, the rupture of the wood material due to bumping is prevented.

  Furthermore, since the wood material is subjected to a dehydration treatment, it is possible to reduce the amount of heat provided to the wood material by the heating device (process) (that is, the amount of heat provided to evaporate the water is unnecessary). Therefore, heat is effectively used for heating and melting or solidifying the synthetic resin), which contributes to improvement in manufacturing efficiency and reduction in energy costs.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the adhesive component-containing liquid is one of a synthetic resin-containing liquid and a natural adhesive-containing liquid.

  According to this configuration, even if any one of the synthetic resin-containing liquid and the natural adhesive-containing liquid is employed as the adhesive component-containing liquid, it effectively functions as a material for modifying the surface layer portion of the wood material. In particular, when a natural adhesive-containing liquid is employed, the natural material has biodegradability, and thus the woody material after the modification treatment is environmentally friendly.

  The invention according to claim 3 is the invention according to claim 2, wherein the synthetic resin-containing liquid is a synthetic resin solution in which a thermosetting synthetic resin is dissolved in water.

  According to this configuration, the synthetic resin-containing liquid can be easily obtained by dissolving the thermosetting synthetic resin in water.

  The invention according to claim 4 is the invention according to claim 2, wherein the synthetic resin-containing liquid is a synthetic resin emulsion in which at least one of a thermosetting synthetic resin and a thermoplastic synthetic resin is dispersed in water in a colloidal form. It is characterized by this.

  According to such a structure, a synthetic resin-containing liquid can be easily obtained by dispersing a thermosetting synthetic resin dissolved in a predetermined solvent in a colloidal form in water with the aid of a surfactant to form a synthetic resin emulsion. It is done.

  According to a fifth aspect of the present invention, in the second aspect of the invention, the synthetic resin-containing liquid is a synthetic resin suspension in which at least one granular material of a thermosetting synthetic resin and a thermoplastic synthetic resin is dispersed in water. It is characterized by being.

  According to such a configuration, a synthetic resin-containing liquid can be easily obtained by dispersing fine particles obtained by finely pulverizing a thermosetting synthetic resin in water.

A sixth aspect of the present invention is the compression apparatus according to any one of the first to fifth aspects, wherein the heating device compresses the surface layer portion to which a history of compression deformation is imparted by a roll body of the injection device. It is characterized by providing.

The invention according to claim 8 is characterized in that, in the invention according to claim 7 , the surface layer portion to which a history of compression deformation is given in the injection step is compressed in the heating step.

According to the inventions of claims 6 and 8, the wood material in which the adhesive component-containing liquid is injected into the surface layer portion is subjected to heat treatment by the heating device (step) while being compressed by the compression device, whereby the surface layer portion of the wood material. Is solidified in a compressed state, and the hardness increases as the density increases. Specifically, for example, in the case of cedar wood, the specific gravity is usually 0.35, but the specific gravity of the surface layer portion subjected to the compression treatment is increased to about 0.6 to 0.7.

According to the first and seventh aspects of the invention, the surface hardness of the wood material can be further improved by the action of the adhesive component having the adhesive performance or the solidifying performance, and the productivity can also be improved. . In addition, by selecting an appropriate type of adhesive component, it is possible to set the curing temperature or softening temperature of the synthetic resin lower than the reaction temperature between the wood structure and water. Discoloration can be prevented, and it is possible to reliably prevent the occurrence of inconvenience that the texture of the wood is impaired in the modified woody material.

  Moreover, since excess water is previously removed from the wood material by the dehydrating device (process), the rupture of the wood material due to bumping in the heating device (process) can be reliably prevented. In addition, the dehydration process is performed on the wood material, so that it is possible to reduce the amount of heat that is used to heat the wood material by the heating device (process), thereby improving manufacturing efficiency and reducing energy costs. Can contribute.

  According to the second aspect of the invention, particularly when a natural adhesive-containing liquid is employed, the natural material has biodegradability, and therefore the wood material after the modification treatment is environmentally friendly. Can be a thing.

  According to invention of Claim 3, a synthetic resin containing liquid can be easily prepared by melt | dissolving a thermosetting synthetic resin in water.

  According to the invention described in claim 4, the thermosetting synthetic resin dissolved in the predetermined solvent is colloidally dispersed in water with the help of a surfactant to emulsify the synthetic resin-containing liquid. Can be prepared.

  According to the fifth aspect of the present invention, it is possible to easily prepare a synthetic resin-containing liquid by dispersing in water fine particles obtained by finely pulverizing a thermosetting synthetic resin or a thermoplastic resin. it can.

According to the inventions of claims 6 and 8, the wood material in which the adhesive component-containing liquid is injected into the surface layer portion is subjected to heat treatment by the heating device (step) while being compressed by the compression device, whereby the surface layer portion of the wood material. Is solidified in a reduced volume state, whereby a woody material having a higher hardness in the surface layer portion can be obtained.

  Drawing 1 is a flowchart for explaining one embodiment of a manufacturing method of surface layer modification woody material concerning the present invention. As shown in FIG. 1, the surface layer compressed wood W3 is composed of an injection step P1 in which the raw material wood W0 is compressed while impregnating the surface layer portion with the adhesive component-containing liquid H, and a synthetic resin-containing liquid in the surface layer portion in the injection step P1. Dehydration process P2 for performing dehydration treatment on the adhesive component-impregnated wood W1 impregnated with water, and a heating process for performing heat treatment on the dehydrated wood W2 obtained by performing the dehydration process in this dehydration process P2 while viewing the press It is manufactured by going through P3.

  In the injection step P1, the compression treatment is performed only on the surface layer portion of the raw material wood W0 in the adhesive component-containing liquid H. Then, when the surface layer portion subjected to the compression treatment is restored to the original capacity, the adhesive component-containing liquid H is sucked into the wood structure, thereby obtaining the adhesive component-impregnated wood W1.

  In the dehydration step P2, the dehydrated wood W2 obtained in the pouring step P1 is dehydrated, so that excess water (specifically, a synthetic resin-containing liquid) is mechanically prior to the next heating step P3. The dehydrated wood W2 removed in step 1 is obtained. By passing through the dehydration step P2, the amount of heat provided for the heat treatment in the heating step P3 can be reduced. In addition, it is possible to prevent the occurrence of inconvenience that moisture in the wood bumps and bursts the wood in the heating step P3.

  In the heating process P3, the compression process is performed again while the heating process is performed on the dehydrated wood W2 obtained in the previous dehydration process P2. For the compression treatment, a method of pressing and holding the dehydrated wood W2 between two metal plates is employed. In addition, with respect to the heat treatment, an energization heating element is provided inside the metal plate, and the dehydrated wood W2 is heated via the metal plate by heat generated by energization of the energization heating element, or the dehydrated wood W2 is interposed via the metal plate. In some cases, high-frequency heating for applying a high frequency is employed.

  In the compression process while heating the dehydrated wood W2 in the heating step P3, when the adhesive component contained in the adhesive component-containing liquid H is a thermoplastic synthetic resin, the dehydrated wood W2 Is heated to a temperature higher than the softening point of the thermoplastic synthetic resin. By doing so, the thermoplastic synthetic resin impregnated in the wood structure of the surface layer portion of the dehydrated wood W2 is softened and melted.

  Since the dehydrated wood W2 is compressed in this state, the softened and melted thermoplastic synthetic resin plays a role of glue in the wood structure, and maintains a reduced volume state of the wood structure. And the surface layer compressed wood W3 derived | led-out from the heating process P3 solidifies the thermoplastic synthetic resin which was softened and melted by natural cooling or forced cooling, and, thereby, the solidified state of the surface layer of the surface layer compressed wood W3 Maintained in a stable state.

  On the other hand, in the compression process while heating the dehydrated wood W2 in the heating step P3, when the adhesive component contained in the adhesive component-containing liquid H is a thermosetting synthetic resin, The dehydrated wood W2 is subjected to a compression treatment while being heated until the temperature becomes higher than the curing point of the heat-effective synthetic resin. By doing so, the thermosetting synthetic resin impregnated in the wood structure of the surface layer portion of the dehydrated wood W2 is solidified and becomes the surface layer compressed wood W3 as a final product as it is without being subjected to a cooling treatment.

FIG. 2 is a graph showing the relationship between the stress (kgf / cm ² ) of wood corresponding to the pressing force applied by the flat plate press and the size of compressive deformation (strain (mm)) of the wood surface layer portion. In the figure, a diagram L1 indicated by a solid line is a diagram when the wood is not subjected to the compression treatment by the injection step P1, and a diagram L2 indicated by a broken line indicates that the size of the compression deformation history in the injection step P1 is 4 mm. The diagram L3 indicated by the one-dot chain line is a diagram when the size of the compression deformation history in the injection step P1 is 8 mm, and the diagram L4 indicated by the two-dot chain line is the compression deformation in the injection step P1. It is a figure in case the dimension of a log | history is 12 mm.

In the diagram L1, the wood does not deform until a large stress of 35 (kgf / cm ² ) is generated, but beyond this, the strain increases relatively easily up to a certain strain, and thereafter The strain increases so as to be approximately proportional to the stress.

  In the diagram L2, deformation up to 2 mm is easy (that is, with a small stress), and after that, deformation is performed in a state where the increase in stress is small up to about 4 to 5 mm. Has increased.

  In the diagram L3, it is easily deformed up to a little over 2 mm, and then deformed in a state where the increase in stress is small up to 8 mm. Thereafter, the strain increases so as to be almost proportional to the stress.

  In the diagram L4, it is easily deformed up to a little over 2 mm, and then deformed in a state where the increase in stress is small up to 10 mm. Thereafter, the strain increases so as to be almost proportional to the stress.

  Thus, in the case of the diagram L2, since the compression deformation history of 4 mm is given in the injection process P1, the stress required for the deformation up to 4 mm and the stress required for the deformation of 4 mm or more are obtained. There is a difference.

  In the case of the diagram L3, since a compressive deformation history of 8 mm is given in the injection process P1, there is a difference between the stress necessary for deformation up to 8 mm and the stress necessary for deformation greater than 8 mm.

  In the case of the diagram L4, since a compressive deformation history of 12 mm is given in the injection step P1, there is a difference between the stress necessary for deformation up to 12 mm and the stress necessary for deformation greater than 12 mm.

  And this invention is comprised so that the said behavior may be used effectively based on the behavior of wood as shown in FIG. Specifically, in the injection step P1, wood is compressed in a synthetic resin-containing liquid instead of water in the case of the blank test. In the case of water, in the case of water, during the immobilization process in the heating step P3, only the hydrolysis action for the wood structure of the water is used, and the wood structure once decomposed and softened is hardened. In the present invention, in the present invention, in addition to the action of water, the property of a synthetic resin having an adhesive effect or an adhesive effect, or the property of a natural adhesive is positively applied to wood. In this way, it is possible to efficiently produce a surface-compressed wood material with a significantly improved surface altitude in a short time compared to when only water is used. it can. Therefore, in the heating process P3, it is not always necessary to raise the temperature of the dehydrated wood W2 to, for example, 180 ° C. or more, which is the reforming temperature of the wood material.

  Examples of the liquid in which the raw material wood W0 is immersed include a synthetic resin solution formed by dissolving a thermosetting synthetic resin in water as the first embodiment. Examples of the thermosetting synthetic resin include glyoxal resin, phenolic resin, melamine resin, urea resin, and maleic acid. Can be mentioned. By dissolving a predetermined amount of these thermosetting synthetic resins in water, the synthetic resin-containing liquid according to the first embodiment of the present invention can be easily obtained.

  Examples of the liquid according to the second embodiment include a synthetic resin emulsion in which a thermosetting synthetic resin or a thermoplastic synthetic resin is dispersed in water in a colloidal form. Thermosetting synthetic resins used for this purpose include epoxy resin, acrylic resin, PVA (Polyvinyl alcohol), polyethylene glycol (PEG) and silicone resin (Silicone resin). And the like.

  Moreover, as a thermoplastic synthetic resin used for this purpose, polyethylene (Polyethylene), polypropylene (Polypropylene), ethylene vinyl acetate copolymer (EVA), polystyrene (Polystyrene), vinyl chloride (Polyvinyl). , Acrylonitrile styrene copolymers (acrylonitrile styrene plastics), acrylonitrile butadiene styrene copolymers (acrylonitrile butylene styrene copolymer), polyamides (polyamide) and polyesters (PET). alate).

  Furthermore, examples of the liquid according to the third embodiment include a synthetic resin suspension in which fine particles of a thermosetting synthetic resin or a thermoplastic synthetic resin are dispersed. As for preparing the synthetic resin suspension, any of the synthetic resins according to the first and second embodiments or other synthetic resins can be applied. A synthetic resin suspension can be obtained by pulverizing such a synthetic resin, for example, until the particle diameter becomes 1 μm or less, and throwing it into water and stirring it.

  In addition to these, examples of the liquid according to the fourth embodiment include natural adhesives. Examples of natural adhesives include gelatin, casein, dextrin, sodium alginate, chitosan, tannic acid, and silk fibroin. be able to.

  And the raw material wood W0 is a state in which it is immersed in any of the liquids according to the first to fourth embodiments described above, and roll bodies that rotate around the axis (each press roll pair 31, 32, described later). 33), a dehydration process P2 for dehydrating the adhesive component-impregnated wood W1 that has been given a history of compression deformation in the injection process P1, and a dehydrated wood dehydrated in the dehydration process P2. Surface layer compressed wood W3 is manufactured through heating process P3 which heats W2 and performs cylinder press processing.

  Therefore, when the capacity of the raw material wood W0 compressed by the roll press device (compression device) 30 performed in the liquid in the injecting step P1, the synthetic resin-containing liquid or ceiling is placed in the wood structure of the surface layer portion of the raw material wood W0. Adhesive component-containing liquid H composed of a ductile adhesive-containing liquid is sucked, whereby adhesive component-impregnated wood W1 in which synthetic resin is uniformly injected into the wood structure of the surface layer portion of raw wood W0 is obtained. In this state, after the dehydration process is subsequently performed in the dehydration process P2, the dehydrated wood W2 is pressed while being heated in the heating process P3.

  Thereby, when the synthetic resin impregnated in the adhesive component-impregnated wood W1 is a thermosetting synthetic resin, the thermosetting synthetic resin is cured in the surface layer compressed wood W3. The compression deformation state is fixed.

  On the other hand, when the synthetic resin impregnated in the adhesive component-impregnated wood W1 is a thermoplastic synthetic resin, the thermosetting synthetic resin softens and spreads in the surface layer compressed wood W3 and penetrates into the wood structure. become. Accordingly, in this state, the surface layer compressed wood W3 is cooled by being allowed to cool or forcedly cooled, so that the softened thermoplastic synthetic resin is solidified, so that the compression deformation state of the surface layer portion of the wood is fixed.

  And in this embodiment, the manufacturing apparatus 10 of the surface layer compression wood W3 used for the manufacturing method of the surface layer compression wood W3 which concerns on such this invention is the resin liquid tank 20 employ | adopted by the said injection | pouring process P1, roll The press device 30 and the transfer device 40 are configured to include a dewatering device 50 employed in the dewatering step P2 and a heating press device (heating device) 60 employed in the heating step P3.

  Hereinafter, the manufacturing apparatus 10 will be described with reference to FIGS. 3 and 4. FIG. 3 is a partially cutaway perspective view showing an embodiment of a manufacturing apparatus 10 for surface layer compressed wood W3, and FIG. 4 is a cross-sectional view of the front view. 3 and 4, the XX direction is referred to as the left-right direction, and the Y-Y direction is referred to as the front-rear direction. In particular, the -X direction is leftward, the + X direction is rightward, the -Y direction is frontward, and the + Y direction is rearward. That's it.

  As shown in FIGS. 3 and 4, the manufacturing apparatus 10 includes the resin liquid tank 20, the roll press apparatus 30, the transfer apparatus 40, the dehydrating apparatus 50, and the heating press apparatus 60 as described above. I have.

  The resin liquid tank 20 may be a general container, but here, a bottom plate 21 having a rectangular shape in a plan view, and a downwardly descending rearward standing upright from a front edge portion of the bottom plate 21. And a pair of left and right side plates 24 erected vertically from the left and right edges of the bottom plate 21. The upper surface is formed by an inverted trapezoidal container in a side view in an open state. The vertical dimension of the resin liquid tank 20 is set to be longer (approximately twice) than at least the length dimension of the raw material wood W0. Such a resin liquid tank 20 is filled with the adhesive component-containing liquid H as described above in a substantially full state.

  The roll press device 30 includes an upper press roll pair (roll body) 31 and an intermediate press roll pair (roll body) 32 that are disposed from the upper side to the lower side along the front inclined plate 22 in the resin liquid tank 20. And three press roll pairs including a lower press roll pair (roll body) 33 and a press roll drive mechanism 34 for driving the press roll pairs 31, 32, 33.

  The upper press roll pair 31 includes a pair of upper roll shafts 311 and a pair of upper roll bodies 312 that are concentrically fitted to the upper roll shafts 311 so as to be integrally rotatable. The intermediate press roll pair 32 includes a pair of intermediate roll shafts 321 and a pair of intermediate roll main bodies 322 that are concentrically and externally fitted to the intermediate roll shafts 321. Further, the lower press roll pair 33 includes a pair of lower roll shafts 331 and a pair of lower roll main bodies 332 that are concentrically and externally fitted to the lower roll shafts 331 respectively.

  The raw wood W0 is inserted in order from above between the upper press roll pair 31, between the intermediate press roll pair 32, and between the lower press roll pair 33, whereby the compression process proceeds sequentially.

  In each such press roll pair 31, 32, 33, the distance d1 between the opposed peripheral surfaces of each upper roll body 312 is set slightly shorter than the thickness dimension of the raw wood W0, as shown in FIG. The distance d2 between the opposing peripheral surfaces of each intermediate roll body 322 is set slightly shorter than the distance d1, and the distance d3 between the opposing peripheral surfaces of each lower roll body 332 is set slightly shorter than the distance d2. Is set.

  Therefore, the raw wood W0 is sequentially compressed thinly by being inserted into the intermediate press roll pair 32 and the lower press roll pair 33 sequentially from the upper press roll pair 31 by the drive of the press roll drive mechanism 34. When exiting the lower press roll pair 33, it is compressed to the same thickness as the distance d3 between the lower roll bodies 332. However, this compression state occurs only in the surface layer portion of the raw material wood W0, and the core portion of the raw material wood W0 is not compressed.

  Then, the raw material wood W0 compressed to the distance d3 is restored to the original thickness by the restoring force that is inherently held immediately after passing between the intermediate press roll pair 32. At this time, since the space in the cell once the volume of the wood tissue is reduced to the original capacity, the adhesive component-containing liquid H in the resin liquid tank 20 is sucked into the wood structure of the surface layer portion of the raw wood W0, and the raw material The cells in the surface layer portion of the wood W0 are filled with the adhesive component-containing liquid H.

  The press roll drive mechanism 34 includes a pair of upper gears 341 that are concentrically fitted to the upper roll shafts 311 so as to be integrally rotatable, and an outer fit that is concentrically rotatable to the intermediate roll shafts 321. A pair of intermediate gears 342 meshed with each other, a pair of lower gears 343 meshed with each of the lower roll shafts 331 so as to rotate integrally therewith, and one of the pair of upper gears 341 and a pair of intermediate gears An upper idle gear 344 interposed between one of the gears 342, a lower idle gear 345 interposed between one of the pair of intermediate gears 342 and one of the pair of lower gears 343, and the pair of lower gears 343 A driving gear 35 that meshes with one (meshing with the rear lower gear 343 in the example shown in FIGS. 3 and 4), and a first drive that drives and rotates the driving gear 35 And an over 36 other.

  Each pair of gears 341, 342, and 343 is meshed with each other. The first drive motor 36 has a drive shaft 361, and the drive shaft 361 is concentrically connected to the drive gear 35 so as to be integrally rotatable.

  According to the press roll drive mechanism 34, the first drive motor 36 is driven to rotate the drive shaft 361 clockwise about the axis, and this drive rotation is caused by the lower gear 343 via the drive gear 35. As a result, the pair of lower gears 343 rotate in directions opposite to each other (the front lower gear 343 is clockwise and the rear lower gear 343 is counterclockwise). Due to the drive rotation of the pair of lower gears 343, the lower press roll pair 33 also rotates.

  The driving rotation of the lower gear 343 is transmitted to the rear intermediate gear 342 via the lower idle gear 345, whereby the pair of intermediate gears 342 are also in opposite directions (the front intermediate gear 342 is clockwise and rearward). The intermediate gear 342 rotates counterclockwise. Due to the drive rotation of the pair of intermediate gears 342, the intermediate press roll pair 32 also rotates.

  Further, the driving rotation of the intermediate gear 342 is transmitted to the rear upper gear 341 via the upper idle gear 344, whereby the pair of upper gears 341 are also opposite to each other (the front upper gear 341 is clockwise, the rear upper The gear 341 rotates counterclockwise. Due to the drive rotation of the pair of upper gears 341, the upper press roll pair 31 also rotates.

  That is, since each press roll pair 31, 32, 33 is driven and rotated through the respective gears by driving the first drive motor 36, the raw wood W0 is placed between the upper press roll pair 31 in this state. , The raw material wood W0 is subjected to press processing in order by the respective press roll pairs 31, 32, 33.

  The transfer device 40 moves the adhesive component-impregnated wood W1 whose raw material wood W0 is subjected to the compression process in the injection step P1 by the roll press device 30 and whose surface layer portion is impregnated with the adhesive component-containing liquid H. It is for making it go to the dehydrator 50.

  The transfer device 40 receives an adhesive component-impregnated wood W1 disposed immediately below the lower press roll pair 33 and changes the posture from an inclined posture to a vertical posture, and the posture changing container 41. And a hydraulic device 42 for driving the device to change the posture.

  The posture changing container 41 is formed to be elongated in the left-right direction, the front-rear width dimension is set slightly wider than the thickness dimension of the adhesive component-impregnated wood W1, and the vertical dimension is the upper and lower dimensions of the adhesive component-impregnated wood W1. The cross-sectional size and the length are set so that the adhesive component-impregnated wood W1 can be completely stored.

  The posture changing container 41 is disposed obliquely at a position directly below the roll press device 30 in the resin liquid tank 20 so as to follow the descending direction of the raw material wood W0 lowered by the roll press device 30. Accordingly, the adhesive component-impregnated wood W1 pushed downward by the roll press device 30 is accommodated in the posture changing container 41 set in the inclined posture.

  In addition, a rotation shaft 411 penetrating the left and right side plates so as to be integrally rotatable is provided at the lower end of the posture changing container 41. The pivot shaft 411 is rotatably penetrated through the pair of side plates 24 of the resin liquid tank 20 in a waterproof state. Therefore, the posture change of the posture change container 41 is performed by forward and reverse rotation around the axis of the rotation shaft 411.

  The hydraulic device 42 includes a first hydraulic power source 43 in which hydraulic equipment such as a hydraulic pump is installed, and a posture changing cylinder device 44 that is driven by the hydraulic pressure supplied from the first hydraulic power source 43. The posture changing cylinder device 44 includes a hydraulic cylinder 441 and a piston rod 442 that moves forward and backward from the hydraulic cylinder 441.

  On the other hand, a connecting arm 412 extending in a direction perpendicular to the axis is fixed to the right end of the pivot shaft 411 that penetrates the right side plate 24 of the resin liquid tank 20. The connecting arm 412 and the tip of the piston rod 442 of the posture changing cylinder device 44 are connected to each other via a connection pin 443. Therefore, when the piston rod 442 moves back and forth from the hydraulic cylinder 441, the posture changing container 41 changes its posture between the inclined posture and the vertical posture via the connecting arm 412 and the rotating shaft 411.

  Therefore, after the adhesive component-impregnated wood W1 is received from the roll press device 30 in a state where the posture changing container 41 is set to the inclined posture, the posture changing container 41 is changed to the vertical posture by driving the hydraulic device 42. Thus, the adhesive component-impregnated wood W <b> 1 accommodated in the posture changing container 41 comes out of the posture changing container 41 with its own buoyancy, floats, and rises toward the dehydrating device 50.

  The dehydrator 50 discharges and dehydrates the adhesive component-containing liquid H once absorbed in the surface layer portion of the adhesive component-impregnated wood W1. The dehydrating device 50 includes a pair of dewatering rolls 51 installed between the pair of side plates 24 at a rear position above the resin liquid tank 20, a second drive motor 52 that drives the pair of dewatering rolls 51, And a dehydrating gear 53 that rotates by driving of the two-drive motor 52.

  The pair of dewatering rolls 51 are fitted around the pair of dewatering roll shafts 511 penetrating between the side plates 24 so as to be concentric and integrally rotatable. The distance between the opposed peripheral surfaces of the pair of dewatering rolls 51 is set to be the same as or slightly larger than the distance d3 between the opposed peripheral surfaces of the lower roll body 332 of the lower press roll pair 33. Further, the adhesive component-containing liquid H filled in the resin liquid tank 20 is set to a liquid level that does not reach the dewatering roll 51.

  A drive gear 522 is fitted on the drive shaft 521 of the second drive motor 52 so as to be concentric and integrally rotatable. The drive gear 522 is meshed with one side of a pair of dewatering gears 53 meshed with each other, and the integral rotation around the drive shaft 521 of the drive gear 522 driven by the second drive motor 52 is transmitted to the dewatering gear 53. It is like that. Then, the rotation of the pair of dewatering gears 53 is transmitted to each dewatering roll 51 via each dewatering roll shaft 511, whereby each dewatering roll 51 rotates in the opposite direction.

  Accordingly, the adhesive component-impregnated wood W1 floating from the vertical posture changing container 41 is captured in the gap between the pair of dewatering rolls 51 rotating in the opposite directions around each dewatering roll shaft 511, and each dewatering is continued. When passing through the gap between the two dewatering rolls 51 while being compressed by the rotation of the roll 51, the moisture contained in the surface layer is squeezed out and dehydrated. The dehydrated wood W2 after the dehydration process is sent to the heating press device 60 by work means such as a work robot (not shown) or manually by the operator, and is subjected to a heat compression process.

  The heating press device 60 is for subjecting the dehydrated wood W2 dehydrated by the dehydrator 50 to high-frequency heat treatment while compressing it, thereby processing the dehydrated wood W2 into a surface compressed wood W3. is there. The heating press device 60 includes a device main body 61 having a rectangular parallelepiped shape, a high-frequency heating mechanism 62 that is attached to the device main body 61 and applies a high frequency to the dehydrated wood W2, and heat-treats the dehydrated wood W2. And a compression mechanism 63 for applying

  The apparatus main body 61 has a rectangular base 611 in plan view, four columns 612 erected from the four corners of the platform 611, and a top plate 613 supported by these four columns. It has.

  The high-frequency heating mechanism 62 applies a high frequency to the pair of upper and lower counter electrodes 621 including the upper electrode 621a and the lower electrode 621b disposed between the base 611 and the top plate 613, and the pair of counter electrodes 621. A high-frequency generator 622. Then, in a state where the dehydrated wood W2 is pressed and clamped between the upper electrode 621a and the lower electrode 621b, a high-frequency heat treatment is applied to the dehydrated wood W2 by applying a high frequency from the high-frequency generator 622 to the pair of counter electrodes 621. As a result, the adhesive component in the adhesive component-containing liquid contained in the surface layer of the dehydrated wood W2 is heated to a predetermined temperature (when the adhesive component is a thermoplastic synthetic resin, the temperature is higher than the softening point and the adhesive component is heated). In the case of a curable synthetic resin, it is heated at a temperature equal to or higher than the curing point.

  The compression mechanism 63 includes a compression processing cylinder device 64 that raises and lowers the counter electrode 621, and a second hydraulic pressure source 65 that supplies hydraulic pressure to the compression processing cylinder device 64.

  The cylinder device 64 for compression processing includes three hydraulic cylinders 641 that are fixed vertically to the top plate 613 of the apparatus main body 61, and piston rods 642 that are suspended from the respective hydraulic cylinders 641 through the top plate 613. And. In the present embodiment, the three compression mechanisms 63 are arranged in series in the front-rear direction at the central portion in the left-right direction, but the present invention is limited to three compression processing cylinder devices 64. However, it may be two or less, or three or more.

  And the lower end part of each piston rod 642 is fixed to the upper surface of the upper electrode 621a, and each piston rod 642 is pulled into each hydraulic cylinder 641 or protrudes from the hydraulic cylinder 641, whereby the upper electrode 621a moves up and down. It is made to do.

  The second hydraulic power source 65 includes a predetermined hydraulic device such as a hydraulic pump that operates by driving an oil storage tank or a drive motor. When the second hydraulic power source 65 is driven, the hydraulic pressure is supplied from one direction to the hydraulic cylinder 641 so that the piston rod 642 protrudes from the hydraulic cylinder 641, while the hydraulic pressure is supplied from the other direction to cause the piston rod 642 to be hydraulic. It is drawn into the cylinder 641.

  Then, with the upper electrode 621a raised, the dehydrated wood W2 derived from the dehydrator 50 is placed on the lower electrode 621b. Subsequently, the piston rod 642 is protruded by the supply of hydraulic pressure from the second hydraulic power source 65 to the hydraulic cylinder 641, whereby the dehydrated wood W2 on the lower electrode 621b is pressed and compressed by the upper electrode 621a. As a result, the dehydrated wood W2 pressed and held between the counter electrodes 621 is in a state where the surface layer portion to which the compression rod is attached by the previous roll press device 30 is compressed again.

  Hereinafter, the operation of the manufacturing apparatus 10 according to the present invention will be described based on FIGS. 4 and 5 with reference to FIGS. 1 and 2 as necessary. Incidentally, FIG. 5 is an explanatory diagram for explaining a state change of the raw material wood W0 in the roll press device 30, and FIG. 5 (A) is a state where the raw material wood W0 is being compressed by the upper press roll pair 31, FIG. 5B shows a state in which the raw wood W0 is being compressed by the upper press roll pair 31 and the intermediate press roll pair 32, and FIG. 5C shows the raw wood W0 in the upper press roll pair 31 and the intermediate press roll pair. The state being compressed by 32 and the lower press roll pair 33 is each shown. In addition, the direction display by Y in FIG. 5 is the same as that in FIG. 4 (−Y: forward, + Y: backward).

  When the surface wood compression process is performed on the raw material wood W0 to produce the surface wood compression wood W3, first, the adhesive component-containing liquid H is poured into the resin liquid tank 20 until it is almost full, and then the first drive motor continues. 36 and the second drive motor 52 are driven. Thus, the driving force of the first drive motor 36 is transmitted to the pair of lower gears 343 via the drive shaft 361 and the drive gear 35, and the rotation of the lower gear 343 is paired via the lower idle gear 345. The rotation of the intermediate gear 342 is transmitted to the pair of upper gears 341 via the upper idle gear 344.

  The driving force of the second drive motor 52 is transmitted to the pair of dewatering rolls 51 via the drive shaft 521, the drive gear 522, and the pair of dewatering gears 53, whereby each dewatering roll 51 is transmitted to each dewatering roll shaft 511. Drives and rotates in directions opposite to each other.

  In this state, the pair of gears 341, 342, and 343 are driven to rotate, so that the press roll pairs 31, 32, and 33 rotate about the roller shafts 311, 321, and 331, respectively. In this rotation, the right press roll rotates around the roller axis in the counterclockwise direction in FIG. 4, while the left press roll rotates around the roller axis in the clockwise direction in FIG.

  In this state where the press roll pairs 31, 32, 33 are driven and rotated, the raw wood W0 is lowered to the right into the gaps formed between the unit rolls of the upper press roll pair 31, as shown in FIG. Insert in an inclined state. By doing so, the raw wood W0 is guided to the rotation of the upper press roll pair 31 in the opposite directions and is introduced into the intermediate press roll pair 32, and then the upper press roll pair 31 and the intermediate press roll pair 32 are driven to rotate. It is guided and introduced into the lower press roll pair 33. Then, the raw material wood W0 that has passed through the lower press roll pair 33 becomes an adhesive component-impregnated wood W1 and is discharged into the posture changing container 41 in a state where the surface layer portion is compressed.

  Here, the mechanism by which the raw material wood W0 becomes the adhesive component-impregnated wood W1 will be described in detail with reference to FIG. 5 which is a partially enlarged view of FIG. 4 showing the arrangement state of the press roll pairs 31, 32, 33. First, in the state shown in FIG. 5 (A), the raw material wood W0 having the thickness dimension d0 is drawn into the gap between the upper press roll pair 31 that is driven and rotated in the opposite directions, thereby the thickness dimension reaches d1. In a compressed state, it is discharged downward from the upper press roll pair 31. At this time, the raw material wood W0 is not uniformly compressed as a whole, but the wood structure of the surface layer portion is destroyed and only that portion is compressed.

  Next, when the raw wood W0 reaches the intermediate press roll pair 32 in which the raw wood W0 is driven and rotated by continuing the drive rotation of the upper press roll pair 31, the raw wood W0 is moved to the intermediate press roll as shown in FIG. It is caught between each roll of the roll pair 32, and the thickness dimension which was d1 is compressed to d2 by this. Also at this time, the raw material wood W0 is not compressed uniformly as a whole, but only the surface layer portion is compressed.

  Subsequently, when the raw wood W0 reaches the lower press roll pair 33 in which the raw wood W0 is driven and rotated by continuing the driving rotation of the upper press roll pair 31 and the intermediate press roll pair 32, the raw wood W0 is shown in FIG. In this way, the lower press roll pair 33 is bitten between the rolls, whereby the thickness dimension of d2 is compressed to d3. Also at this time, the raw material wood W0 is not compressed uniformly as a whole, but only the surface layer portion is compressed.

  Then, since the raw wood W0 extruded downward from the lower press roll pair 33 is restored to its original thickness, the adhesive component-containing liquid H is sucked into the cells of the restored wood tissue (see FIG. 5 (C)), thereby forming an adhesive component-impregnated wood W1 in which the surface layer portion of the raw material wood W0 is impregnated with the adhesive component-containing liquid H.

  Next, returning to FIG. 4, the adhesive component-impregnated wood W <b> 1 formed by the raw material wood W <b> 0 sequentially passing through the press roll pairs 31, 32, 33 is accommodated in the posture change container 41 set in the inclined posture. Is done. Then, after the adhesive component-impregnated wood W1 is accommodated in the posture changing container 41, the hydraulic device 42 is driven, and the connecting arm 412 is rotated around the rotation shaft 411 by the immersion of the piston rod 442 into the hydraulic cylinder 441. As a result, the posture changing container 41 integrated with the connecting arm 412 changes its posture from the inclined posture to the vertical posture.

  Then, the adhesive component impregnated wood W1 accommodated in the posture changing container 41 is lifted by its own buoyancy, and is received by the pair of dewatering rolls 51 of the dewatering device 50 whose upper ends are rotating in opposite directions.

  The adhesive component-impregnated wood W1 received by the pair of dewatering rolls 51 is then rotated in the opposite direction of the pair of dewatering rolls 51 (the rear dewatering roll 51 is rotated around the rear dewatering roll shaft 511). And the front dewatering roll 51 is pushed upward by a state of being pressed and clamped by the anti-clockwise rotation around the front dewatering roll shaft 511. The adhesive component-containing liquid H absorbed in the surface layer portion by the compression treatment by the pair of dewatering rolls 51 is squeezed out, whereby the dewatering treatment is performed.

  The dehydrated wood W2 that has been subjected to the dehydration process discharges the excess adhesive component-containing liquid H that has been absorbed by the surface layer portion thereof, so that the necessary and sufficient adhesive component-containing liquid H becomes the cellular tissue of the surface layer portion of the wood. It remains in the state.

  Next, the dehydrated wood W2 discharged from the dehydrating apparatus 50 is loaded between the counter electrodes 621 of the heating press apparatus 60 by the work robot or the human power of the operator. Subsequently, the piston rod 642 protrudes from the hydraulic cylinder 641 by driving the compression mechanism 63, and the dehydration wood W2 sandwiched between the upper electrode 621a and the lower electrode 621b is compressed by the lowering of the upper electrode 621a. The

  By this compression treatment, the surface layer portion where the dehydrated wood W2 has a compression history and the internal tissue absorbs the adhesive component-containing liquid H is compressed and reduced in volume. In this state, the high frequency heating mechanism 62 is driven to apply a high frequency from the high frequency generator 622 to the dehydrated wood W <b> 2 through the counter electrode 621. The adhesive component in the adhesive component-containing liquid H absorbed by the surface layer portion of the dehydrated wood W2 by such high-frequency heating is subjected to heat treatment.

  When the synthetic resin component in the adhesive component-containing liquid H is a thermoplastic synthetic resin, it is softened and melted by such high-frequency heating and exhibits a function as an adhesive. Therefore, the surface layer compressed wood W3 can be obtained by taking out the dehydrated wood W2 from between the counter electrodes 621 after being subjected to the high-frequency application process for a predetermined time, and naturally allowing it to cool in a state of being clipped by a predetermined clip fitting.

  On the other hand, when the adhesive component in the adhesive component-containing liquid H is a thermosetting synthetic resin, the surface layer compressed wood W3 is immediately obtained by heating to a temperature equal to or higher than the curing temperature of the synthetic resin by high-frequency heat treatment. be able to.

  As described above in detail, the manufacturing apparatus (method) for the surface layer modified wood material according to the present embodiment is an apparatus (method) for manufacturing the surface layer compressed wood W3 as the wood material in which the surface layer portion is selectively compressed. , Roll press device 30 as a compression device that selectively compresses the surface layer portion of raw wood W0 in a synthetic resin-containing liquid or a natural adhesive-containing liquid using each press roll pair 31, 32, 33 (injection step) P1), and a dehydrating apparatus that dehydrates the adhesive component-impregnated wood W1 in which the surface layer portion is selectively compressed by the roll press device 30 and the surface layer portion having a compression history is impregnated with the adhesive component-containing liquid W1. 50 (dehydration step P2), and a heating press device 60 (heating step P3) for pressing the surface layer portion given the history of compression deformation by the roll press device 30 while heating. Equipped and are configured.

  According to the manufacturing apparatus (method) of the surface layer modified wood material having such a structure, the surface layer portion in the adhesive component-containing liquid H in the roll press apparatus 30 (injection step P1) is the peripheral surface of each press roll pair 31, 32, 33. The raw material wood W0 which has been selectively compressed and deformed by the above is restored to its original state when the compressed state is released after passing through the respective press roll pairs 31, 32, 33, and the adhesive component-containing liquid H is once shrunk at that time. The restoration of the raw material wood W0 to the original capacity of the space in the tissue is absorbed into the tissue, thereby forming the adhesive component-impregnated wood W1.

  Then, by the dehydration process performed by the dehydrating device 50 (dehydration step), excess water is removed from the adhesive component-impregnated wood W1 to form the dehydrated wood W2.

  The dehydrated wood W2 has a history of compression deformation in the roll press device 30 in the surface layer portion by the heat compression processing in the heating press device 60 (heating step P3) that can be compressed while being heated. The compression process is easily performed by being in the state. By this heat compression treatment, the surface layer portion of the raw material wood W0, which is once absorbed by the surface layer portion of the raw material wood W0 and compressed by the heated synthetic resin remaining in the wood structure serving as an adhesive or a solidifying agent, is the original. As a result, permanent solidification in which the compression deformation state of the surface layer portion is maintained is realized.

  And when the synthetic resin in the adhesive component containing liquid H is a thermosetting synthetic resin, the said thermosetting synthetic resin hardens | cures at the time of the heat processing in the heating process P3, and, thereby, the surface layer part of the raw material wood W0 A selective compression elastic deformation state, that is, a cured state is stably maintained.

  On the other hand, when the synthetic resin in the adhesive component-containing liquid H is a thermoplastic synthetic resin, the thermoplastic synthetic resin softens during the heat treatment in the heating step P3 and exhibits good fluidity. It penetrates deep into the tissue. By subjecting the raw material wood W0 in this state to natural cooling or forced cooling, the surface layer portion of the raw material wood W0 is stably maintained in a compression-deformed state.

  In this manner, by impregnating the surface layer portion of the raw material wood W0 with the adhesive component-containing liquid H using the roll press device 30 in the injection step P1, the heating step P3 subsequently performed after the dehydration step P2 is performed while heating. Since the compression deformation state of the surface layer portion of the raw material wood W0 is maintained based on the adhesion performance or the solidification performance inherently possessed by the synthetic resin by the press treatment of the material, it is simply heated with the wood structure as in the past. Compared with the method of fixing the compression deformation state of the raw material wood W0 by the reaction with water for a long time, the surface performance is improved and the productivity is also improved. Further, since the curing temperature or softening temperature of the synthetic resin can be set lower than the reaction temperature between the wood structure and water, discoloration of the surface of the raw material wood W0 due to the high temperature can be prevented. The texture of the wood W0 is maintained.

  Table 1 is an effect table in which the effects of the present invention are summarized in a list for each item.

  Natural adhesives and silicone-based synthetic resins are safe because they do not contain formaldehyde. Even with other synthetic resins containing formaldehyde, by applying heat treatment, low VOC (Volatile Organic Compounds) below the standard value (F ☆☆☆☆ (Forster) of Japanese agricultural standards) and can do.

  The present invention is not limited to the above-described embodiment, and the following aspects can also be adopted.

  (1) In the manufacturing apparatus 10 of the surface layer compressed wood W3 of the above embodiment, the roll press device 30, the transfer device 40, and the dehydrating device 50 are mounted in one resin liquid tank 20, but instead of doing this The roll press device 30, the transfer device 40, and the dewatering device 50 may be separately configured as separate devices independent of each other.

  (2) In the above-described embodiment, the dehydration process P2 is interposed between the injection process P1 and the heating process P3. However, the dehydration process P2 is not necessarily required and is not particularly required. In this case, the adhesive component-impregnated wood W1 obtained by compressing the raw material wood W0 in the injection step P1 is immediately sent to the heating step P3.

  (3) In the above-described embodiment, high-frequency heating by the high-frequency heating mechanism 62 is employed for the heat treatment of the dehydrated wood W2 in the heating step P3 (or the adhesive component-impregnated wood W1 when the dehydration is not performed). The present invention is not limited to the use of high-frequency heating for heating the wood in the heating step P3. For example, an electric heating element such as a nichrome wire is embedded in the upper and lower press plates sandwiching the wood. The wood may be heated by heat generated by energizing the energization heating element.

  (4) In the above embodiment, three press roll pairs, that is, the upper press roll pair 31, the intermediate press roll pair 32, and the lower press roll pair 33 are employed in the roll press apparatus 30, but the present invention provides a press The number of roll pairs is not limited to three, but may be two or less, or may be four or more.

  (5) In the above embodiment, the first hydraulic pressure source 43 and the second hydraulic pressure source 65 are combined into one hydraulic pressure source, and the posture changing cylinder device 44 and the compression processing are set by the hydraulic pressure from the single hydraulic pressure source. Both cylinder devices 64 may be driven.

  (6) In the above embodiment, the heating press device 60 is employed in the heating step P3, and the dehydrated wood W2 is subjected to the heat treatment while being subjected to the press treatment. Only processing may be performed. By doing so, even if the surface layer portion of the dehydrated wood W2 is not consolidated, the resin or natural adhesive that is the adhesive component in the adhesive component-containing liquid H that has entered the wood structure of the surface layer portion is solidified. In addition, the surface performance can be improved, for example, the surface of the wood material is hardened by the action of the adhesive component itself.

It is process drawing for demonstrating one Embodiment of the manufacturing method of the surface layer modified wood material which concerns on this invention. It is a graph which shows the relationship between the stress (kgf / cm < ² >) of the timber corresponding to the pressing force applied with a flat plate press, and the compressive deformation (strain (mm)) dimension of a timber surface layer part. It is a partially notched perspective view which shows one Embodiment of the manufacturing apparatus of surface layer compression wood. It is sectional drawing of the front view of the manufacturing apparatus shown in FIG. It is explanatory drawing for demonstrating the state change of the raw material timber in a roll press apparatus, (A) is the state in which raw material timber is being compressed by the upper press roll pair, (B) And (C) shows a state in which the raw material wood is being compressed by the upper press roll pair, the intermediate press roll pair, and the lower press roll pair, respectively.

DESCRIPTION OF SYMBOLS 10 Manufacturing apparatus 20 Resin liquid tank 21 Bottom plate 22 Front inclination board 23 Back board 24 Side board 30 Roll press apparatus (compression apparatus)
31 Upper press roll pair (roll body)
311 Upper roll shaft 312 Upper roll body 32 Intermediate press roll pair (roll body)
321 Intermediate roll shaft 322 Intermediate roll body 33 Lower press roll pair (roll body)
331 Lower roll shaft 332 Lower roll body 34 Press roll drive mechanism 341 Upper gear 342 Intermediate gear 343 Lower gear 344 Upper idle gear 345 Lower idle gear 35 Drive gear 36 First drive motor 361 Drive shaft 40 Transfer device 41 Posture change container 411 times Driving shaft 412 Connecting arm 42 Hydraulic device 43 First hydraulic power source 44 Posture changing cylinder device 441 Hydraulic cylinder 442 Piston rod 443 Connection pin 50 Dehydrating device 51 Dehydrating roll 511 Dehydrating roll shaft 52 Driving motor 521 Driving shaft 522 Driving gear 53 Dehydrating gear 60 Heating press device (heating device)
61 apparatus main body 611 foundation stand 612 support 613 top plate 62 high frequency heating mechanism 621 counter electrode 621a upper electrode 621b lower electrode 622 high frequency generator 63 compression mechanism 64 compression processing cylinder device 641 hydraulic cylinder 642 piston rod 65 second hydraulic power source H adhesion Component-containing liquid P1 Injection process P2 Dehydration process P3 Heating process W0 Raw material wood W1 Adhesive component-impregnated wood W2 Dehydrated wood W3 Surface compressed wood

Claims (8)

An apparatus for producing a wood material having a modified surface layer,
An injection device that injects the adhesive component-containing liquid into the surface layer portion while selectively temporarily compressing the surface layer portion of the wooden material using a roll body in the adhesive component-containing liquid;
A heating device that heats the surface layer portion into which the adhesive component-containing liquid has been injected by the injection device;
The injection device comprises:
A rectangular bottom plate in plan view, a front inclined plate standing obliquely from the front edge portion of the bottom plate and inclined downward toward the rear, and a rear standing substantially vertically from the rear end portion of the bottom plate A resin bath having a plate and left and right side plates;
A roll press apparatus in which at least a part of the roll body is disposed in the adhesive component-containing liquid provided along the front inclined plate and stored in the resin liquid tank;
A dehydrating device provided along the rear plate and having at least a part of a dewatering roll disposed on a liquid surface of the adhesive component-containing liquid stored in the resin liquid tank;
A posture change that is provided near the bottom of the resin liquid tank and changes the posture between an inclined posture for receiving the wood material discharged from the roll press device and a vertical posture for discharging the received wood material to the dewatering device. An apparatus for producing a surface-modified woody material comprising a transfer device having a container.   The apparatus for producing a surface modified woody material according to claim 1, wherein the adhesive component-containing liquid is one of a synthetic resin-containing liquid and a natural adhesive-containing liquid.   The apparatus for producing a surface-modified woody material according to claim 2, wherein the synthetic resin-containing liquid is a synthetic resin solution in which a thermosetting synthetic resin is dissolved in water.   3. The surface layer-modified woody material according to claim 2, wherein the synthetic resin-containing liquid is a synthetic resin emulsion in which at least one of a thermosetting synthetic resin and a thermoplastic synthetic resin is dispersed in water in a colloidal form. manufacturing device.   3. The surface-modified woody material according to claim 2, wherein the synthetic resin-containing liquid is a synthetic resin suspension in which at least one granular material of a thermosetting synthetic resin and a thermoplastic synthetic resin is dispersed in water. Material production equipment. The heating device, the surface modification wood according to any one of claims 1 to 5, characterized in that it comprises a compression device for compressing the surface layer portion history of compressive deformation imparted by the roll body of the injection device Material production equipment. It is a manufacturing method which manufactures a surface layer modified woody material using the manufacturing apparatus in any one of Claims 1 thru | or 6 , Comprising: The surface layer part of the wood material is selectively and temporarily used using the said injection apparatus. An injection step of injecting the adhesive component-containing liquid into the surface layer part while compressing, a dehydration step of performing a dehydration process on the woody material after completion of the temporary compression process in the injection step, and the heating device And a heating step of performing a heat treatment on the surface layer portion into which the adhesive component-containing liquid has been injected in the dehydration step. The method for producing a surface-modified woody material according to claim 7 , wherein the surface layer portion to which a history of compressive deformation is given in the injection step is compressed in the heating step.

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